Final answer:
The method used to place a coating on fabric is Impregnation, which allows for even distribution and penetration of a coating material into the fabric. Option B is correct.
Step-by-step explanation:
The method that may be used to place a coating on fabric is B) Impregnation. This process involves treating the fabric with a solution or coating material and then allowing or causing the coating to fill or penetrate the fabric evenly. Coating treatments can provide fabrics with a variety of beneficial qualities, such as water resistance, flame , or even antimicrobial properties.
As for the options provided:
A) Precipitation and B) Impregnation are both related to material treatment processes, but precipitation commonly refers to the process in which a substance is separated from a solution as a solid, while impregnation involves permeating or saturating something with a substance.
C) Desiccation involves the removal of moisture (drying out), which is not related to applying a coating to fabrics.
D) Sublimation is the transition of a substance directly from the solid to the gas phase without passing through the liquid phase. This process is used in dye-sublimation printing on fabrics, but it does not apply to the context of simply applying a coating.